CN211078789U - Black water and grey water combined treatment system - Google Patents

Abstract

The utility model provides a black water buck combined treatment system, this system includes: the impeller air flotation unit, the sedimentation tank, the bioreactor and the photoelectric ultrasonic array which are connected in sequence cooperate with the catalytic modification titanium dioxide nanotube device; the treatment system further comprises a comminution unit connected to the bioreactor. The processing method comprises the following steps: the method comprises the following steps of firstly, preliminarily removing impurities from grey water through an impeller air floatation unit, then, feeding the grey water into a sedimentation tank, and adding a magnetic flocculating agent into the sedimentation tank to carry out magnetic flocculation on the grey water; crushing the black water by a crushing unit; introducing the grey water after magnetic flocculation and the crushed black water into a bioreactor for nitrogen and phosphorus removal; treating the mixed sewage after nitrogen and phosphorus removal by using a photoelectric ultrasonic array to coordinate with a catalytic modified titanium dioxide nanotube to obtain reclaimed water; and (5) recycling the reclaimed water. The utility model discloses can effectively overcome the shortcoming that the play water quality of water that current black water grey water treatment facilities exists is poor, impact load resistance ability is weak, and the treatment effect is stable.

Description

Black water and grey water combined treatment system

Technical Field

The utility model belongs to the technical field of black water buck processing, concretely relates to black water buck joint processing system.

Background

With the rapid development of economic technology in China, the building industry is more and more emphasized as the technical transformation of high-consumption industry, and the construction of a green building system as a sustainable development method becomes a new choice for the building industry. And the efficient cyclic utilization of water resources in the design of a green building system is crucial to the emission reduction and the resource utilization of sewage and waste of the whole system. According to the new edition of engineering design for recycling urban sewage (GB50035-2016) and the relevant water reuse water quality standards, indexes such as total nitrogen, total phosphorus and the like in the reuse water have higher requirements. However, most of the existing green building system designs face the backward sewage treatment device, and the effluent quality is not good and can not be directly recycled; the equipment has large volume and large floor area; the device has poor impact load resistance, poor stability resistance, narrow applicability and the like. Therefore, the water resource recycling and reclamation in green buildings still face great challenges.

The green building sewage mainly comprises green building domestic sewage (black water) and grey water. The green building domestic sewage mainly comprises the following components: any type of toilet and urinal effluents and other waste; containing effluent from a living animal; other waste waters mixed with the effluents defined above, green building domestic sewage, also commonly referred to as "black water"; whereas grey water refers to other sewage generated in building systems than black water, mainly waste water and waste from kitchens, laundry rooms, toilets and the like.

The existing treatment process of black water and grey water of green buildings mainly comprises a biochemical method, a physicochemical method and an electrolytic method. The physicochemical method has the advantages of small equipment volume, convenient installation and simple operation, but needs a large amount of chemical disinfectant and large storage space. In addition, the treatment effect of the physical and chemical method is not ideal enough, the treated sewage is difficult to directly recycle, and the operation cost is high; also, this method requires frequent cleaning of the pipes, or it may block the pipes to generate offensive odors. The electrolytic method has small occupied area and light weight; the equipment adopts a modular design, and is beneficial to daily maintenance. The electrolysis method can not only treat black water, but also treat grey water; the use and the operation of the equipment are very convenient, and no peculiar smell is caused. It also has a number of drawbacks, however, as follows: the one-time investment is large; the operation cost is higher than that of a biochemical method, but lower than that of a physicochemical method; the concentration of the residual chlorine in the effluent is higher and does not reach the standard; the pH value of the effluent is acidic. The biochemical method has low manufacturing cost and low operation and maintenance cost, but the equipment occupies larger area and has small application range; and requires professionals to cultivate the sludge; the sludge needs to be re-cultured every time of starting, which is time-consuming and labor-consuming; the method is not suitable for the severe fluctuation of water quality and water quantity of green buildings, and has poor treatment effect; periodic cleaning is required or off-flavors can be generated. Therefore, the research on novel treatment methods and technologies for green building black water grey water is a development direction which is urgently needed at present by carrying out optimization integration, redevelopment and adaptive innovation on the various existing technologies.

Disclosure of Invention

To the problem that prior art exists, the utility model provides a black water buck combined treatment system, this system and method have area little, the treatment effeciency is high, the nitrogen and phosphorus removal is effectual, COD clearance is high and the water after the processing can carry out the advantage of reuse of reclaimed water. The technical scheme of the utility model is that:

in a first aspect, the present invention provides a combined treatment system for black water and grey water, comprising: the impeller air flotation unit, the sedimentation tank, the bioreactor and the photoelectric ultrasonic array which are connected in sequence cooperate with the catalytic modification titanium dioxide nanotube device; the treatment system further comprises a comminution unit connected to the bioreactor.

Further, the structure of the bioreactor comprises: the reactor comprises a reactor main body, reactor main body open-top, be equipped with the biomembrane support frame in the reactor main body, the biomembrane support frame is in by cylindrical PVC skeleton and encircleing grid formula stainless steel rack on the PVC skeleton constitutes, biomembrane support frame below is equipped with aeration equipment, the storage water tank is still connected to the reactor main body.

Furthermore, a water valve is arranged on the side of the reactor main body.

Further, a peristaltic pump is arranged between the reactor main body and the water storage tank.

Further, the device for modifying the titanium dioxide nanotube by the photoelectricity and ultrasonic array concerted catalysis comprises a quartz glass reactor, wherein a reference electrode, a counter electrode and a working electrode are arranged in the quartz glass reactor, the working electrode is a modified titanium dioxide nanotube, and the reference electrode, the counter electrode and the working electrode are respectively connected with a power supply; the inner wall of the quartz glass reactor is provided with an ultrasonic array in a surrounding way.

Further, the modified titanium dioxide nanotube comprises one precious metal of Au, Ru, Ag and Pt deposited on the surface of the titanium dioxide nanotube; or doping Fe on the surface of the titanium dioxide nanotube³⁺、Ru³⁺、Mo⁵⁺、 Re⁵⁺、Rh³⁺、V⁴⁺A transition metal ion of (1); or compounding SnO on the surface of the titanium dioxide nanotube₂、 PbS、ZrO₂、WO₃Or one of CdSe semiconductor material, or photosensitization is carried out on the surface of the titanium dioxide nanotube by using a photosensitizer, or Fe/N or L a/Fe is co-doped on the surface of the titanium dioxide nanotube.

Further, the reference electrode comprises a calomel electrode and a silver/silver chloride electrode.

Further, the counter electrode comprises a platinum counter electrode and a carbon counter electrode.

Further, the ultrasonic array is a rectangular ultrasonic array.

Further, the processing system also comprises a vacuum collection unit, and the vacuum collection unit is connected with the crushing unit.

In a second aspect, the present invention provides a combined treatment method for black water and grey water, which adopts the above treatment system, and comprises: the method comprises the following steps of firstly, preliminarily removing impurities from grey water through an impeller air floatation unit, then, feeding the grey water into a sedimentation tank, and adding a magnetic flocculating agent into the sedimentation tank to carry out magnetic flocculation on the grey water; crushing the black water by a crushing unit; introducing the grey water after magnetic flocculation and the crushed black water into a bioreactor for nitrogen and phosphorus removal; treating the mixed sewage after nitrogen and phosphorus removal by using a photoelectric ultrasonic array to coordinate with a catalytic modified titanium dioxide nanotube to obtain reclaimed water; and (5) recycling the reclaimed water.

Further, the magnetic flocculant is a mixture of magnetic nanoparticles and an inorganic coagulant according to a mass ratio of 1: (0.5-2) mixing.

Further, the magnetic nanoparticles comprise Fe₃O₄At least one of magnetic nanoparticles and FeO magnetic nanoparticles.

Further, the inorganic coagulant comprises at least one of ferric trichloride, polyaluminium chloride and ferrous sulfate.

Further, the specific control parameters of the treatment of the nitrogen and phosphorus removed mixed sewage by the photoelectricity ultrasonic array concerted catalysis modified titanium dioxide nano tube are as follows: the external bias voltage is 0.7V-2.5V, the ultrasonic frequency is 20 kHz-28 kHz, the power is 22W-27W, the ultrasonic array is a rectangular array, and the volume covered by the rectangular array is consistent with the volume of the nanotube.

The beneficial effects of the utility model reside in that: the utility model discloses a processing system carries out the biofilm formation through the support frame that PVC skeleton and stainless steel rack formed in bioreactor, has both reduced the interference to dynamic membrane formation, makes reactor treatment effeciency improve again to it is more stable to make reactor play water quality of water. In the modified titanium dioxide nanotube processing unit, organic matters and some small-molecule harmful pollutants are fully degraded, the concentration of the substances difficult to degrade in the biological film is reduced, and the overall water purification effect of the device is improved. In addition, the treatment system of the utility model occupies smaller area, and the effluent quality after treating the black water and the grey water is better; the effluent can be recycled, such as washing or toilet flushing, and the recycling range is wide; and the energy consumption is less, and the resources are saved. In a word, the utility model discloses can effectively overcome the shortcoming that the play water quality of water that current black water grey water processing apparatus exists is poor, impact load resistance ability is weak, and the treatment effect is stable.

Drawings

Fig. 1 is a schematic view of the structural connection of the combined treatment system for black water and grey water according to the present invention.

FIG. 2 is a schematic structural view of the bioreactor of the present invention.

Fig. 3 is a schematic structural diagram of the device for modifying titanium dioxide nanotubes by the cooperation of the photoelectric ultrasonic array and the catalysis.

In the drawings 1-3, 1-impeller air flotation unit, 2-sedimentation tank, 3-bioreactor, 4-photoelectricity ultrasonic array synergetic catalytic modified titanium dioxide nanotube device, 5-vacuum collection unit, 6-crushing unit, 31-reactor main body, 32-biomembrane support frame, 33-aeration device, 34-water storage tank, 35-water valve, 36-peristaltic pump, 331-aeration pipe, 332-air pump, 41-quartz glass reactor, 42-reference electrode, 43-counter electrode, 44-working electrode, 45-power supply, 46-ultrasonic array and 47-natural light source.

Detailed Description

In the description of the present invention, it should be noted that the specific conditions are not specified in the examples, and the description is made according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The present invention will now be described in further detail with reference to the accompanying drawings and specific examples, which are given by way of illustration and not of limitation.

As shown in fig. 1-3, the specific embodiment of the present invention provides a black water and grey water combined treatment system, which includes: an impeller air flotation unit 1, a sedimentation tank 2, a bioreactor 3 and a photoelectricity ultrasonic array concerted catalysis modified titanium dioxide nanotube device 4 which are connected in sequence; the treatment system further comprises a comminution unit 6, which comminution unit 6 is connected to the bioreactor 3.

In the embodiment of the present invention, the structure of the bioreactor 3 comprises: cylindrical reactor main part 31, be equipped with biomembrane support frame 32 in the reactor main part, biomembrane support frame 32 is in by cylindrical PVC skeleton and encircleing grid formula stainless steel rack on the PVC skeleton constitutes, biomembrane support frame 32 below is equipped with aeration equipment 33, storage water tank 34 is still connected to reactor main part 31, reactor main part 31 lateral part is equipped with water valve 35, through water valve 35, supernatant and mud sample can discharge. A peristaltic pump 36 is arranged between the reactor body 31 and the water storage tank 34.

In the embodiment of the present invention, the modified titanium dioxide nanotube device 4 with the photoelectricity and ultrasound array and the catalysis comprises a quartz glass reactor 41, and a reference electrode 42, a counter electrode 43 and a working electrode 44 are disposed in the quartz glass reactor 41. The reference electrode 42 comprises a calomel electrode, a silver/silver chloride electrode and the like, the counter electrode 43 comprises a platinum counter electrode, a carbon counter electrode and the like, and the working electrode 44 is a modified titanium dioxide nanotube. The reference electrode 42, the counter electrode 43 and the working electrode 44 are respectively connected with a power supply 45; the inner wall of the quartz glass reactor 41 is provided with a rectangular ultrasonic array 46 in a surrounding manner. The preparation method of the modified titanium dioxide nanotube comprises the following steps: preparing a titanium dioxide nanotube substrate; and modifying the titanium dioxide nanotube substrate. The method for preparing the titanium dioxide nanotube substrate comprises an anodic oxidation method, a hydrothermal method and a template method, and the technology for preparing the titanium dioxide nanotube substrate by adopting the methods is mature at present, such as the preparation technology disclosed in CN201710876833.8 and CN 201811008100.3.

The modified titanium dioxide nanotube comprises one of noble metals of Au, Ru, Ag and Pt deposited on the surface of the titanium dioxide nanotube; or doping Fe on the surface of the titanium dioxide nanotube³⁺、Ru³⁺、Mo⁵⁺、Re⁵⁺、 Rh³⁺、V⁴⁺A transition metal ion of (1); or compounding SnO on the surface of the titanium dioxide nanotube₂、PbS、 ZrO₂、WO₃The method is a mature method at present and is not described in detail herein, either a semiconductor material of CdSe or a photosensitizer is used for photosensitization on the surface of the titanium dioxide nanotube, or the surface of the titanium dioxide nanotube is co-doped with Fe/N or L a/Fe.

Preferably, the surface of the titanium dioxide nanotube is doped with Fe³⁺、Ru³⁺、Mo⁵⁺、Re⁵⁺、Rh³⁺、V⁴⁺A transition metal ion of (1); or compounding SnO on the surface of the titanium dioxide nanotube₂、PbS、ZrO₂、 WO₃Or co-doping Fe/N or L a/Fe on the surface of the titanium dioxide nanotube, thereby having better treatment effect on grey water and black water in the embodiment of the utility model.

The treatment system also comprises a vacuum collection unit 5, wherein the vacuum collection unit 5 is connected with the crushing unit 6, black water is collected through a negative pressure difference generated by vacuum in the vacuum collection unit 5 and is sent to the crushing unit to be crushed into small units which are easy to degrade.

The embodiment of the utility model provides a black water grey water joint treatment method still provides adopts above-mentioned processing system, includes:

(1) the method comprises the following steps of firstly, preliminarily removing impurities from grey water through an impeller air floatation unit, then, feeding the grey water into a sedimentation tank, and adding a magnetic flocculating agent into the sedimentation tank to carry out magnetic flocculation on the grey water; the magnetic flocculant is prepared from magnetic nanoparticles and an inorganic coagulant according to a mass ratio of 1: (0.5-2) mixing.

In an embodiment of the invention, the magnetic nanoparticles comprise Fe₃O₄At least one of magnetic nanoparticles and FeO magnetic nanoparticles. The inorganic coagulant comprises at least one of ferric trichloride, polyaluminium chloride and ferrous sulfate.

(2) The black water is collected by the vacuum collection unit, flows into the vacuum collection tank by utilizing the negative pressure difference generated by vacuum, and then enters the crushing unit to be crushed into small units which are easy to degrade.

(3) Introducing the grey water after magnetic flocculation and the crushed black water into a bioreactor for nitrogen and phosphorus removal, wherein the specific control parameters are as follows: the external bias voltage is 0.7V-2.5V, the ultrasonic frequency is 20 kHz-28 kHz, the power is 22W-27W, the ultrasonic array is a rectangular array, and the volume covered by the rectangular array is consistent with the volume of the nanotube.

(4) Treating the mixed sewage after nitrogen and phosphorus removal by using a photoelectric ultrasonic array to coordinate with a catalytic modified titanium dioxide nanotube to obtain reclaimed water;

(5) and (5) recycling the reclaimed water.

Example 1

The embodiment provides a combined treatment method for black water and grey water of a certain construction site in a sunken area, which adopts the system and the method, and comprises the following specific processes:

(1) collecting oily sewage in kitchens, laundries and toilets in construction sites by a sewage pipeline, and storing the oily sewage in a liquid phase temporary storage tank;

(2) pumping oily sewage from the liquid-phase temporary storage tank by using a sewage pump, and feeding the oily sewage into an impeller air flotation oil removal device (disclosed by CN 201510939645.6) through a water inlet pipe, wherein a large amount of bubbles generated by a micro-bubble generator are adhered to oil droplets in the sewage, and then the oil droplets quickly rise to the water surface along with the bubbles; the floating oil floating to the water surface is concentrated by the upper cone hopper under the action of hydraulic pressure and then is discharged by the oil discharge pipe; and the sewage after being deoiled is discharged into a sedimentation tank through a guide plate and a drain pipe. The diameter D of an impeller of the impeller air floatation oil removal device is 200-400 mm, the rotating speed V of the impeller is 900-1500 r/min, the circumferential linear speed u is 10-15 m/s, and the distance between the impeller and a guide blade is adjusted to be smaller than 7-8 mm.

(3) Adding magnetic nano-scale particles Fe into a sedimentation tank₃O₄And polyaluminium chloride flocculant (mass ratio is 1: 1) to enhance the removing capability of flocculation on the surfactant, and utilize the difference of magnetism of various substances to realize separation (magnetic separation) in a non-uniform magnetic field.

(4) The sewage of toilets and urinals in construction sites is first pumped by means of a vacuum collection device (published by CN 201420251291.7) into which faeces and waste are sucked from toilets and other sanitary equipment by means of air pressure difference and small amounts of flushing water; the vacuum degree is generally controlled to be 30-60 percent, and the vacuum degree is not too small or too large; pipeThe vacuum in the system is generated and maintained by an ejector connected at the tail end of a pipe island, the sewage in a collecting cabinet is the working water of the ejector, the sewage in the cabinet is pumped into the ejector by a jet pump, the side surface of the ejector is connected with a vacuum collecting pipe system, the sewage or air in the pipe is sucked, the system generates vacuum, the water discharged by the ejector returns to the cabinet, the circulation is carried out, the collected excrement is sent into a mechanical crushing device (disclosed by CN 03209710.7) for mechanical crushing, the excrement and the pretreated grey water are sent into a bioreactor reactor together, the main body of the bioreactor is cylindrical, the water flows out automatically by pressure difference, supernatant and sludge samples are taken out from a middle water valve, 3 perforated aeration pipes are arranged at the bottom of a membrane module (a biomembrane supporting frame), the aeration pipes at two sides are opened during normal operation, the oxygen supply is provided for the microorganisms, and 1.2-2. 2.0L/(s.²) To prevent the membrane face (whole support frame surface) from being blocked; and at the end of the period, the two aeration pipes on the side edges are still kept open, the aeration pipe in the middle is opened for hydraulic flushing, and the filling ratio of the bioreactor is 40 percent. The surface of the water treated by HSFDMBR is doped with Fe through the synergetic catalysis of a photoelectric ultrasonic array³⁺The titanium dioxide nanotube device is used for carrying out advanced catalytic oxidation treatment, under the condition of natural light, the external bias voltage provided by a power supply is 0.7V-2.5V, the ultrasonic frequency is 20 kH-28 kHz, the power is 22W-27W, the ultrasonic array is a rectangular array, the uniform ultrasonic action of all surfaces of the reactor is ensured, and the electrolyte solution is 0.01 mol/L K₂SO₄And (3) solution. The semiconductor modified titanium dioxide nanotube photocatalyst absorbs photons more efficiently in an oxidation-reduction process on the surfaces of the photoanode, the cathode and the electrolyte solution, and the electrons on the valence band and the holes on the conduction band are separated under the excitation of the photons; in order to achieve better separation of electrons from holes, an external bias and an ultrasonic array are required. Therefore, the modified titanium dioxide nanotube catalyzes the unremoved organic matters to be decomposed into micromolecular substances under the combined action of the photoelectric sound and the photo-acoustic sound. The highly oxygenated water is then returned to a flush toilet or used to irrigate a garden. The indices of the mixed wastewater before entering the bioreactor and the treated water are shown in table 1.

TABLE 1

Example 2

The present embodiment provides a method for jointly treating black water and grey water on a certain construction site in a sunken area, which adopts the system and method of embodiment 1, and the differences are as follows: the magnetic flocculant is magnetic nano-scale particle FeO and ferric trichloride flocculant (mass ratio is 1: 2), the filling ratio of the bioreactor is set to be 40%, and the modified titanium dioxide nanotube of the modified titanium dioxide nanotube device is surface doped with V⁴⁺Titanium dioxide nanotubes. The indices of the mixed wastewater before entering the bioreactor and the treated water are shown in table 2.

TABLE 2

Example 3

The present embodiment provides a method for jointly treating black water and grey water on a certain construction site in Shenyang and flat areas, which adopts the system and method of embodiment 1, and is different from the following steps: the magnetic flocculant is magnetic nano-scale particle Fe₃O₄And ferrous sulfate flocculant (mass ratio of 1: 0.5), and the membrane surface scouring flow rate is increased to 3.0L/(s.m)²) The rapid recovery of the processing load of the device is realized, and the modified titanium dioxide nanotube of the modified titanium dioxide nanotube device is a surface composite PbS titanium dioxide nanotube. The indices of the mixed wastewater before entering the bioreactor and the treated water are shown in Table 3.

TABLE 3

Example 4

The embodiment provides a combined treatment method for black water and grey water of a building site, which adopts the system and the method of the embodiment 1, and is characterized in that: modified titanium dioxide nano-tube deviceThe rice tube is surface-compounded with ZrO₂The titanium dioxide nanotube, set up a parallel light source in the position of the titanium dioxide nanotube catalytic unit of photoelectric sound intensification to prevent that the overcast and rainy weather illumination intensity is not enough. The indices of the mixed wastewater before entering the bioreactor and the treated water are shown in Table 4.

TABLE 4

Example 5

The embodiment provides a black water and grey water combined treatment method for a certain construction site in a muddy south sunken yang region, which adopts the system and the method in the embodiment 1, and is characterized in that inflow water can contain sulfanilamide with the concentration of 100 mug/L or less, a modified titanium dioxide nanotube of a modified titanium dioxide nanotube device is a surface co-doped Fe/N titanium dioxide nanotube, high-efficiency catalytic degradation can be realized through the modified titanium dioxide nanotube, 88% of sulfanilamide is removed from the detected water through liquid chromatography, pollution possibly caused in the water recycling or discharging process is reduced, and indexes of mixed wastewater before entering a bioreactor and treated water are shown in a table 5.

Comparative example 1

The present comparative example provides a method for jointly treating black water and grey water of a certain construction site in muddy south of Shenyang, which is the same site as that of example 5, and the impeller air flotation unit, the sedimentation tank, the vacuum collection unit and the crushing unit adopted in the prior art are all the same as those of the comparative document 5, except that: a conventional membrane bioreactor (disclosed by CN 201020106444.0) was used, and there was no device for modifying titanium dioxide nanotubes by photoelectrochemical array in cooperation with catalysis. The indices of the mixed wastewater before entering the conventional membrane reactor and the treated water are shown in Table 5.

Comparative example 2

The present comparative example provides a method for jointly treating black water and grey water of a certain construction site in muddy south of Shenyang, which is the same site as that of example 5, and the impeller air flotation unit, the sedimentation tank, the vacuum collection unit and the crushing unit adopted in the prior art are all the same as those of the comparative document 5, except that: a composite self-generated dynamic membrane bioreactor (disclosed by CN 200710036584.8) is adopted, and no device for modifying the titanium dioxide nanotube by the photoelectricity ultrasonic array concerted catalysis is provided. The indexes of the mixed wastewater before entering the composite self-generated dynamic membrane bioreactor and the treated water are shown in Table 5.

Table 5 comparison of treatment effects of example 5 and comparative examples 1 and 2

As can be seen from tables 1 to 5, the utility model discloses handle grey water and black water, go out water quality of water and reached the standard of urban miscellaneous water among the municipal sewage regeneration to there is fine removal effect to micropollutants such as sulfanilamide in the waste water.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A black water grey water combined treatment system, comprising: the impeller air flotation unit, the sedimentation tank, the bioreactor and the photoelectric ultrasonic array which are connected in sequence cooperate with the catalytic modification titanium dioxide nanotube device; the treatment system further comprises a comminution unit connected to the bioreactor.

2. A black water grey water combined treatment system as claimed in claim 1 wherein the bioreactor configuration comprises: the reactor comprises a reactor main body, reactor main body open-top, be equipped with the biomembrane support frame in the reactor main body, the biomembrane support frame is in by cylindrical PVC skeleton and encircleing grid formula stainless steel rack on the PVC skeleton constitutes, biomembrane support frame below is equipped with aeration equipment, the storage water tank is still connected to the reactor main body.

3. A black water grey water combined treatment system as claimed in claim 2 wherein the side of the reactor body is further provided with a water valve.

4. A black water grey water combined treatment system as claimed in claim 2 wherein a peristaltic pump is provided between the reactor body and the storage tank.

5. The black water and grey water combined treatment system according to claim 1 or 2, wherein the device for modifying the titanium dioxide nanotubes through the synergy of the photoelectric ultrasonic array and the catalysis comprises a quartz glass reactor, a reference electrode, a counter electrode and a working electrode are arranged in the quartz glass reactor, the working electrode is the modified titanium dioxide nanotubes, and the reference electrode, the counter electrode and the working electrode are respectively connected with a power supply; the inner wall of the quartz glass reactor is provided with an ultrasonic array in a surrounding way.

6. A black water grey water combined treatment system according to claim 5, wherein the modified titania nanotubes comprise a noble metal selected from Au, Ru, Ag, Pt deposited on the surface of the titania nanotubes; or doping Fe on the surface of the titanium dioxide nanotube³⁺、Ru³⁺、Mo⁵⁺、Re⁵⁺、Rh³⁺、V⁴⁺A transition metal ion of (1); or compounding SnO on the surface of the titanium dioxide nanotube₂、PbS、ZrO₂、WO₃Or one of CdSe semiconductor material, or photosensitization is carried out on the surface of the titanium dioxide nanotube by using a photosensitizer, or Fe/N or L a/Fe is co-doped on the surface of the titanium dioxide nanotube.

7. A black water grey water combined treatment system as claimed in claim 5 wherein the reference electrode comprises a calomel electrode, a silver/silver chloride electrode.

8. A black water grey water combined treatment system as claimed in claim 5 wherein the counter electrode comprises a platinum counter electrode, a carbon counter electrode.

9. A black water grey water combined treatment system as claimed in claim 5 wherein the ultrasonic array is a rectangular ultrasonic array.

10. A black water grey water combined treatment system as claimed in claim 1 further comprising a vacuum collection unit, said vacuum collection unit being connected to said comminution unit.

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